Dokyeom also goes by DK. He was born Lee Seokmin 이석민 on Tuesday, February 18, 1997, in Suji-gu, Yongin-si, Gyeonggi-do. He and Vernon were born on the same day, one year apart.

Like fellow members Mingyu and The8, he was born in the Chinese Year of the Ox. His zodiac star sign is Aquarius, like Vernon and Dino. He’s 178 cm or 5'10", the same height as Hoshi. DK and The8’s blood type is O.

He attended Seoul School of Performing Arts. He also went to Shinli Kindergarten and YP Music Academy. He has an older sister.

He likes to spend his time cheerfully, so he likes to make others feel energetic, but sometimes it gets out of control, so he thinks that he needs to exercise more self-control. For fun, he sings while wearing headphones while resting. His favorite food is Wenchang chicken, a chicken dish from the Wenchang city area in Hainan, China.